ThinkGeek has debuted a new, smaller version of its Joystick-It physical joystick accessory compatible with the iPhone and iPod touch. Like the prior version for iPad, the Joystick-It for iPhone and iPod touch is made from solid milled aluminum, can be placed overtop any virtual on-screen control, and can be removed and repositioned without harming the screen. ThinkGeek’s Joystick-It for iPhone and iPod touch is available now and sells for $18;…